B 18a

Flyable, self-powered 18” touring LF extension for ARES 8 line arrays

TransducersLF : 1 x 18″
SPL peak / 1m (measured)132 dB
Weight55kg / 121.25lbs
RiggingFrom 0 to 10°
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B 18a is a compact, self-powered LF extension for ARES 8 line arrays, enhancing the system’s low end response and directivity.  ARES 8 and B 18a unite with S / MTSub Series subs to form a consistent, high performance, 4-way line array system.  B 18a is fully compatible with the ARES 8 rigging system and can be flown alongside, on top of or behind ARES 8 elements, or deployed in ground stack / standalone configurations.

The B 18a features an advanced AUDIOFOCUS SCiO Class D amplifier module with integrated DSP and houses a long excursion 18″ neodymium driver, combining front diffusion, bass reflex, and transmission line design for ultimate efficiency and performance.

B 18a is built with pride in Belgium and coated in tough, weather-resistant polyurea to safeguard your investment. The cabinet front is protected by a rigid metal grill, backed by acoustically transparent foam.


  • LF extension for ARES 8 series
  • Flown or ground stacked
  • Pole mount socket
  • Self-powered plug ‘n play
  • Integrated rigging
  • 2 presets

Technical specifications

DescriptionLF extension for ARES 8
Transducers LF: 1 x 18″
Frequency range (-6dB)55Hz-100Hz
SPL peak (1)132 dB
ProcessingDedicated AUDIOFOCUS SCiO presets
Rigging20 different inter-cabinet angle positions, from 0 to 10°
Audio ConnectorsIN: 1×3-point XLR
LINK: 1×3-point XLR
Network connectors1 x etherCON for control
Power ConnectorsIN: 1×3-point powerCON TRUE1TOP
LINK: 1×3-point powerCON TRUE1TOP
Dimensions (H x W x D)510 x 650 x 705 mm
20.07 x 25.59 x 27.75 inches
Weight55kg / 121.25lbs
FinishHighly resistant polyurea coating

CabinetHigh grade birch plywood

(1) Peak level measured at 1 m under free field conditions using pink noise with crest factor 5


Connect & Control your amplifiers

AUDIOFOCUS SCiO amplifiers can be securely monitored and controlled anytime, anywhere over the network.

Our intuitive Web UI network manager is web-based, eliminating the need for software downloads, and allows multiple amplifiers to be managed from your preferred device.

The network manager offers the comprehensive processing options you would expect from a high-end system controller.
For more detailed information please visit the AUDIOFOCUS SCiO page.


Note – this Quick Start Guide is for use with products manufactured from July 2022

Technical sheet
B 18a

PDF • 520 Ko • 02/08/2022

Quick Start guide
SCio Web Connection

PDF • 250 Ko • 13/06/2023

User Manual

PDF • 6.50 Mo • 10/07/2023

Firmware update SCiO
+ Procedure guide

ZIP • 5.9 Mo • 09/04/2024
PDF • 143 Ko • 09/04/2024